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diff --git a/src/common/entropy.h b/src/common/entropy.h
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * entropy.h - prototypes pour le calcul de l'entropie d'un contenu binaire
+ *
+ * Copyright (C) 2024 Cyrille Bagard
+ *
+ *  This file is part of Chrysalide.
+ *
+ *  Chrysalide is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Chrysalide is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _COMMON_ENTROPY_H
+#define _COMMON_ENTROPY_H
+
+
+#include "../arch/archbase.h"
+
+
+
+/* Détermine l'entropie d'un contenu binaire. */
+double compute_entropy(const bin_t *, size_t);
+
+
+
+#endif  /* _COMMON_ENTROPY_H */